<template>
  <div>
    <el-form ref="deptForm" :model="form" :rules="rules" label-width="120px">
      <el-form-item label="部门名称" prop="name">
        <el-input v-model="form.name" style="width:80%" placeholder="1-50个字符" />
      </el-form-item>
      <el-form-item label="部门编码" prop="code">
        <el-input v-model="form.code" style="width:80%" placeholder="1-50个字符" />
      </el-form-item>
      <el-form-item label="部门负责人" prop="manager">
        <el-select v-model="form.manager" style="width:80%" placeholder="请选择">
          <el-option v-for="item in employees" :key="item.id" :value="item.username" :label="item.username" />
        </el-select>
      </el-form-item>
      <el-form-item label="部门介绍" prop="introduce">
        <el-input v-model="form.introduce" style="width:80%" placeholder="1-300个字符" type="textarea" :rows="3" />

      </el-form-item>
      <el-form-item>
        <el-button type="primary" size="small" @click="hSubmit">确定</el-button>
        <el-button size="small" @click="hCancel">取消</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import { getEmployeeSimple } from '@/api/employees.js'
import { addDepartments, getDepartDetail, updateDepartments } from '@/api/departments.js'
export default {
  props: {
    id: {
      type: String,
      required: true
    },
    isEdit: {
      type: Boolean,
      required: true
    },
    originList: {
      type: Array,
      required: true
    }
  },
  data() {
    // 自定义的校验规则 1
    const validCode = (rule, value, callback) => {
      console.log(value)
      // 获取所以存在的部门编号
      let existCodeList = this.originList.map(item => item.code)
      if (this.isEdit) {
        // 把当前正在编辑的部门编号（this.id）排除在外
        // console.log('现在是编辑状态，正在编辑的id是', this.id)
        // 过滤掉当前的部门, map得到部门编号列表
        existCodeList = this.originList.filter(item => item.id !== this.id).map(item => item.code)
      }
      // 判断是否存在 决定是否通过
      existCodeList.includes(value) ? callback(new Error(value + '已存在')) : callback()
    }
    // 2.同级部门名校验
    const validName = (rule, value, callback) => {
      // 添加的同级部门名非重
      let existNameList = this.originList.filter(item => item.pid === this.id).map(item => item.name)
      // 若为编辑
      if (this.isEdit) {
        // 取出当前编辑元素的pid
        const pid = this.originList.find(item => item.id === this.id).pid
        // 通过pid筛选同级元素   除去自己
        existNameList = this.originList.filter(item => item.pid === pid && item.id !== this.id).map(item => item.name)
      }
      existNameList.includes(value) ? callback(new Error(value + '已存在')) : callback()
    }
    return {
      form: {
        name: '', // 部门名称
        code: '', // 部门编码
        manager: '', // 部门管理者
        introduce: '' // 部门介绍
      },
      rules: {
        name: [
          { required: true, message: '部门名称不能为空', trigger: 'blur' },
          { min: 1, max: 50, message: '部门名称要求1-50个字符', trigger: 'blur' },
          { validator: validName, trigger: 'blur' }
        ],
        code: [
          { required: true, message: '部门编码不能为空', trigger: 'blur' },
          { min: 1, max: 50, message: '部门编码要求1-50个字符', trigger: 'blur' },
          { validator: validCode, trigger: 'blur' }
        ],
        manager: [
          { required: true, message: '部门负责人不能为空', trigger: 'blur' }
        ],
        introduce: [
          { required: true, message: '部门介绍不能为空', trigger: 'blur' },
          { min: 1, max: 300, message: '部门介绍要求1-300个字符', trigger: 'blur' }
        ]
      },
      employees: []
    }
  },
  watch: {
    // 监听id变化
    'id': function(newVal, oldVal) {
      console.log('id变了！ 新值：', newVal, '旧值', oldVal)
      // 重发请求获取详情
      this.getDepartDetailDate()
    }
  },
  created() {
    // 在created中调用发ajax
    this.loadEmployee()
    // 调用获取部门信息函数
    this.getDepartDetailDate()
  },
  methods: {
    // 确认按钮
    hSubmit() {
      this.$refs.deptForm.validate(valid => {
        if (valid) {
          this.isEdit ? this.doEdit() : this.doAdd()
        }
      })
    },
    hCancel() {
      // 通知父组件去关闭弹层
      this.$emit('close')
    },
    // 封装一个函数用于获取负责人列表
    async loadEmployee() {
      const { data } = await getEmployeeSimple()
      console.log('员工信息', data)
      this.employees = data.data
    },
    // 封装添加函数
    async doAdd() {
      await addDepartments({ ...this.form, pid: this.id })
      // 3. 传父组件：关闭弹层，再次更新数据
      this.$emit('success')
    },
    // 封装函数用于回显数据
    async getDepartDetailDate() {
      if (this.isEdit) {
        const { data } = await getDepartDetail(this.id)
        console.log(data)
        this.form = data.data
      }
    },
    async doEdit() {
      await updateDepartments(this.form)
      this.$message.success('修改成功')
      this.$emit('success')
    },
    // 子组件封装函数他用于清空表单 用于父组件获取
    restFrom() {
      //  清空表单数据及校验结果
      this.$refs.deptForm.resetFields()
    }
  }
}
</script>

<style>

</style>
